Hair coming through the mesh?
Particle System Settings:


Check "Advanced"
Check "Rotation"


Orientation Axis: Normal-Tangent

Children


Simple -> Interpolated

Render


Under "Object" check "Object Rotation"



Hair strand object:


Viewport Header Tool Settings



Options
Under "Affect Only" check "Origins"

Move the origin to the root of the hair strand object
Unset "Affect Only Origins"
Rotate the hair strand object with pressing : R Y 90